Synonyms of dubious in English:

dubious


See definition of dubious

adjective

1‘I was rather dubious about the whole idea’

SYNONYMS
doubtful, uncertain, unsure, in doubt, hesitant
undecided, unsettled, unconfirmed, undetermined, indefinite, unresolved, up in the air
wavering, vacillating, irresolute, in a quandary, in a dilemma, on the horns of a dilemma
sceptical, suspicious
informal iffy
ANTONYMS

certain, definite

2‘a dubious businessman’

SYNONYMS
suspicious, suspect, under suspicion, untrustworthy, unreliable, undependable, questionable
informal shady, fishy, funny, not kosher
British informal dodgy
ANTONYMS

trustworthy

3‘she gave him a dubious reply’

SYNONYMS
equivocal, ambiguous, indeterminate, indefinite, unclear, vague, imprecise, hazy, puzzling, enigmatic, cryptic
open to question, debatable, questionable
ANTONYMS

decisive, clear, definite